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Double-logarithmic (Sudakov) asymptotics at the theory of electroweak interactions | | B.I. Ermolaev
; M. Greco
; S.M. Oliveira
; S.I. Troyan
; | | Date: |
26 Nov 2002 | | Subject: | hep-ph | | Affiliation: | Ioffe Phys. Tech. Inst., Russia; CFTC, UL, Portugal), M. Greco (University Rome, Italy), S.M. Oliveira (CFTC, UL, Portugal) and S.I. Troyan (St.Petersburg INP, Russia | | Abstract: | Accounting for double-logarithmic contributions to high-energy (>> 100 GeV) e^+ e^- annihilation into a quark or a lepton pair in the kinematics where the final particles are colinear to the e^+e^- beams leading to a sizable difference between the forward and backward scattering amplitudes, i.e. to the forward-backward asymmetry. When the annihilation is accompanied by emission of n electroweak bosons in the multi-Regge kinematics, it turns out that the cross sections of the photon and Z production have the identical energy dependence and asymptotically their ratio depends only on the Weinberg angle (is equal to tan^{2n} theta_W) whereas the energy dependence of the cross section of the W production is suppressed by factor s^{-0.4} compared to them. | | Source: | arXiv, hep-ph/0211415 | | Services: | Forum | Review | PDF | Favorites | |
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